Mercurial > libervia-pubsub
annotate idavoll/pgsql_storage.py @ 121:4f0113adb7ed
Add Node._check_node_exists() calls to all Node methods, because nodes could
have
been deleted in between calls.
Add Node.get_subscription().
Only fire deferred (with None) on success of Node.add_subscription().
Fix Node.set_configuration() to actually work and only update the Node objects
configuration when the SQL query has succeeded.
Implement Node.remove_subscription().
Implement Node.is_subscribed().
Implement LeafNode methods (unchecked!).
author | Ralph Meijer <ralphm@ik.nu> |
---|---|
date | Tue, 12 Apr 2005 12:26:05 +0000 |
parents | dfef919aaf1b |
children | c4ee16bc48e5 |
rev | line source |
---|---|
107 | 1 import copy |
2 import storage | |
3 from twisted.enterprise import adbapi | |
4 from twisted.internet import defer | |
5 from twisted.words.protocols.jabber import jid | |
6 from zope.interface import implements | |
7 | |
8 class Storage: | |
9 | |
10 implements(storage.IStorage) | |
11 | |
12 def __init__(self, user, database): | |
13 self._dbpool = adbapi.ConnectionPool('pyPgSQL.PgSQL', user=user, | |
14 database=database) | |
15 | |
16 def get_node(self, node_id): | |
17 return self._dbpool.runInteraction(self._get_node, node_id) | |
18 | |
19 def _get_node(self, cursor, node_id): | |
20 configuration = {} | |
21 cursor.execute("""SELECT persistent, deliver_payload FROM nodes | |
22 WHERE node=%s""", | |
23 (node_id,)) | |
24 try: | |
25 (configuration["pubsub#persist_items"], | |
26 configuration["pubsub#deliver_payloads"]) = cursor.fetchone() | |
27 except TypeError: | |
28 raise storage.NodeNotFound | |
29 else: | |
30 node = LeafNode(node_id, configuration) | |
31 node._dbpool = self._dbpool | |
32 return node | |
33 | |
34 def get_node_ids(self): | |
35 d = self._dbpool.runQuery("""SELECT node from nodes""") | |
36 d.addCallback(lambda results: [r[0] for r in results]) | |
37 return d | |
38 | |
39 def create_node(self, node_id, owner, type='leaf'): | |
40 return self._dbpool.runInteraction(self._create_node, node_id, owner) | |
41 | |
42 def _create_node(self, cursor, node_id, owner): | |
113 | 43 node_id = node_id.encode('utf-8') |
44 owner = owner.userhost().encode('utf-8') | |
107 | 45 try: |
46 cursor.execute("""INSERT INTO nodes (node) VALUES (%s)""", | |
113 | 47 (node_id)) |
48 except cursor._pool.dbapi.OperationalError: | |
107 | 49 raise storage.NodeExists |
50 | |
51 cursor.execute("""SELECT 1 from entities where jid=%s""", | |
113 | 52 (owner)) |
107 | 53 |
54 if not cursor.fetchone(): | |
55 cursor.execute("""INSERT INTO entities (jid) VALUES (%s)""", | |
113 | 56 (owner)) |
107 | 57 |
58 cursor.execute("""INSERT INTO affiliations | |
59 (node_id, entity_id, affiliation) | |
60 SELECT n.id, e.id, 'owner' FROM | |
61 (SELECT id FROM nodes WHERE node=%s) AS n | |
62 CROSS JOIN | |
63 (SELECT id FROM entities WHERE jid=%s) AS e""", | |
113 | 64 (node_id, owner)) |
107 | 65 |
66 def delete_node(self, node_id): | |
67 return self._dbpool.runInteraction(self._delete_node, node_id) | |
68 | |
69 def _delete_node(self, cursor, node_id): | |
70 cursor.execute("""DELETE FROM nodes WHERE node=%s""", | |
71 (node_id.encode('utf-8'),)) | |
72 | |
73 if cursor.rowcount != 1: | |
74 raise storage.NodeNotFound | |
75 | |
76 def get_affiliations(self, entity): | |
77 d = self._dbpool.runQuery("""SELECT node, affiliation FROM entities | |
78 JOIN affiliations ON | |
79 (affiliations.entity_id=entities.id) | |
80 JOIN nodes ON | |
81 (nodes.id=affiliations.node_id) | |
82 WHERE jid=%s""", | |
113 | 83 (entity.userhost().encode('utf8'),)) |
107 | 84 d.addCallback(lambda results: [tuple(r) for r in results]) |
85 return d | |
86 | |
87 def get_subscriptions(self, entity): | |
88 d = self._dbpool.runQuery("""SELECT node, jid, resource, subscription | |
89 FROM entities JOIN subscriptions ON | |
90 (subscriptions.entity_id=entities.id) | |
91 JOIN nodes ON | |
92 (nodes.id=subscriptions.node_id) | |
93 WHERE jid=%s""", | |
94 (entity.userhost().encode('utf8'),)) | |
95 d.addCallback(self._convert_subscription_jids) | |
96 return d | |
97 | |
98 def _convert_subscription_jids(self, subscriptions): | |
99 return [(node, jid.JID('%s/%s' % (subscriber, resource)), subscription) | |
100 for node, subscriber, resource, subscription in subscriptions] | |
101 | |
102 class Node: | |
103 | |
104 implements(storage.INode) | |
105 | |
106 def __init__(self, node_id, config): | |
107 self.id = node_id | |
108 self._config = config | |
109 | |
121
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110 def _check_node_exists(self, cursor): |
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111 cursor.execute("""SELECT id FROM nodes WHERE node=%s""", |
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112 (self.id.encode('utf8'))) |
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113 if not cursor.fetchone(): |
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114 raise backend.NodeNotFound |
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115 |
107 | 116 def get_type(self): |
117 return self.type | |
118 | |
119 def get_configuration(self): | |
120 return self._config | |
121 | |
122 def set_configuration(self, options): | |
121
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123 return self._dbpool.runInteraction(self._set_configuration, |
107 | 124 options) |
125 | |
126 def _set_configuration(self, cursor, options): | |
121
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127 self._check_node_exists(cursor) |
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128 |
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129 config = copy.copy(self._config) |
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130 |
107 | 131 for option in options: |
121
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132 if option in config: |
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133 config[option] = options[option] |
107 | 134 |
135 cursor.execute("""UPDATE nodes SET persistent=%s, deliver_payload=%s | |
136 WHERE node=%s""", | |
121
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137 (config["pubsub#persist_items"], |
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138 config["pubsub#deliver_payloads"], |
107 | 139 self.id.encode('utf-8'))) |
140 | |
121
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141 self._config = config |
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142 |
107 | 143 def get_meta_data(self): |
144 config = copy.copy(self._config) | |
145 config["pubsub#node_type"] = self.type | |
146 return config | |
147 | |
148 def get_affiliation(self, entity): | |
149 return self._dbpool.runInteraction(self._get_affiliation, entity) | |
150 | |
151 def _get_affiliation(self, cursor, entity): | |
121
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152 self._check_node_exists(cursor) |
107 | 153 cursor.execute("""SELECT affiliation FROM affiliations |
154 JOIN nodes ON (node_id=nodes.id) | |
155 JOIN entities ON (entity_id=entities.id) | |
156 WHERE node=%s AND jid=%s""", | |
157 (self.id.encode('utf8'), | |
113 | 158 entity.userhost().encode('utf8'))) |
107 | 159 |
160 try: | |
161 return cursor.fetchone()[0] | |
162 except TypeError: | |
163 return None | |
164 | |
121
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165 def get_subscription(self, subscriber): |
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166 return self._dbpool.runInteraction(self._get_subscription, subscriber) |
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167 |
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168 def _get_subscription(self, cursor, subscriber): |
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169 self._check_node_exists(cursor) |
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170 |
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171 userhost = subscriber.userhost() |
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172 resource = subscriber.resource or '' |
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173 |
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174 cursor.execute("""SELECT subscription FROM subscriptions |
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175 JOIN nodes ON (nodes.id=subscriptions.node_id) |
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176 JOIN entities ON |
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177 (entities.id=subscriptions.entity_id) |
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178 WHERE node=%s AND jid=%s AND resource=%s""", |
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179 (self.id.encode('utf8'), |
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180 userhost.encode('utf8'), |
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181 resource.encode('utf8'))) |
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182 try: |
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183 return cursor.fetchone()[0] |
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184 except TypeError: |
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185 return None |
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186 |
107 | 187 def add_subscription(self, subscriber, state): |
188 return self._dbpool.runInteraction(self._add_subscription, subscriber, | |
189 state) | |
190 | |
191 def _add_subscription(self, cursor, subscriber, state): | |
121
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192 self._check_node_exists(cursor) |
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193 |
107 | 194 userhost = subscriber.userhost() |
195 resource = subscriber.resource or '' | |
196 | |
197 try: | |
198 cursor.execute("""INSERT INTO entities (jid) VALUES (%s)""", | |
199 (userhost.encode('utf8'))) | |
113 | 200 except cursor._pool.dbapi.OperationalError: |
107 | 201 pass |
202 | |
203 try: | |
204 cursor.execute("""INSERT INTO subscriptions | |
205 (node_id, entity_id, resource, subscription) | |
206 SELECT n.id, e.id, %s, %s FROM | |
207 (SELECT id FROM nodes WHERE node=%s) AS n | |
208 CROSS JOIN | |
209 (SELECT id FROM entities WHERE jid=%s) AS e""", | |
210 (resource.encode('utf8'), | |
211 state.encode('utf8'), | |
212 self.id.encode('utf8'), | |
213 userhost.encode('utf8'))) | |
113 | 214 except cursor._pool.dbapi.OperationalError: |
121
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215 raise storage.SubscriptionExists |
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216 |
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217 def remove_subscription(self, subscriber): |
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218 return self._dbpool.runInteraction(self._remove_subscription, |
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219 subscriber) |
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220 |
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221 def _remove_subscription(self, cursor, subscriber): |
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222 self._check_node_exists(cursor) |
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223 |
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224 userhost = subscriber.userhost() |
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225 resource = subscriber.resource or '' |
107 | 226 |
121
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227 cursor.execute("""DELETE FROM subscriptions WHERE |
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228 node_id=(SELECT id FROM nodes WHERE node=%s) AND |
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229 entity_id=(SELECT id FROM entities WHERE jid=%s) |
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230 AND resource=%s""", |
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231 (self.id.encode('utf8'), |
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232 userhost.encode('utf8'), |
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233 resource.encode('utf8'))) |
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234 if cursor.rowcount != 1: |
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235 raise storage.SubscriptionNotFound |
107 | 236 |
121
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237 return None |
107 | 238 |
239 def get_subscribers(self): | |
121
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240 d = self._dbpool.runInteraction(self._get_subscribers) |
107 | 241 d.addCallback(self._convert_to_jids) |
242 return d | |
243 | |
121
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244 def _get_subscribers(self, cursor): |
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245 self._check_node_exists(cursor) |
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246 cursor.execute("""SELECT jid, resource FROM subscriptions |
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247 JOIN nodes ON (node_id=nodes.id) |
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248 JOIN entities ON (entity_id=entities.id) |
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249 WHERE node=%s AND |
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250 subscription='subscribed'""", |
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251 (self.id.encode('utf8'),)) |
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252 return cursor.fetchall() |
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253 |
107 | 254 def _convert_to_jids(self, list): |
255 return [jid.JID("%s/%s" % (l[0], l[1])) for l in list] | |
256 | |
257 def is_subscribed(self, subscriber): | |
121
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258 return self._dbpool.runInteraction(self._is_subscribed, subscriber) |
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259 |
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260 def _is_subscribed(self, cursor, subscriber): |
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261 self._check_node_exists(cursor) |
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262 |
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263 userhost = subscriber.userhost() |
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264 resource = subscriber.resource or '' |
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265 |
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266 cursor.execute("""SELECT 1 FROM entities |
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267 JOIN subscriptions ON |
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268 (entities.id=subscriptions.entity_id) |
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269 JOIN nodes ON |
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270 (nodes.id=subscriptions.node_id) |
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271 WHERE entities.jid=%s AND resource=%s |
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272 AND node=%s AND subscription='subscribed'""", |
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273 (userhost.encode('utf8'), |
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274 resource.encode('utf8'), |
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275 self.id.encode('utf8'))) |
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276 |
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277 return cursor.fetchone() is not None |
107 | 278 |
279 class LeafNode(Node): | |
280 | |
281 implements(storage.ILeafNode) | |
282 | |
283 type = 'leaf' | |
284 | |
285 def store_items(self, items, publisher): | |
121
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286 return self._dbpool.runInteraction(self._store_items, items, publisher) |
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287 |
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288 def _store_items(self, cursor, items, publisher): |
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289 self._check_node_exists(cursor) |
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290 for item in items: |
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291 self._store_item(cursor, item, publisher) |
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292 |
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293 def _store_item(self, cursor, item, publisher): |
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294 data = item.toXml() |
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295 cursor.execute("""UPDATE items SET date=now(), publisher=%s, data=%s |
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296 FROM nodes |
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297 WHERE nodes.id = items.node_id AND |
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298 nodes.node = %s and items.item=%s""", |
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299 (publisher.full().encode('utf8'), |
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300 data.encode('utf8'), |
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301 self.id.encode('utf8'), |
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302 item["id"].encode('utf8'))) |
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303 if cursor.rowcount == 1: |
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304 return |
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305 |
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306 cursor.execute("""INSERT INTO items (node_id, item, publisher, data) |
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307 SELECT id, %s, %s, %s FROM nodes WHERE node=%s""", |
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308 (item["id"].encode('utf8'), |
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309 publisher.full().encode('utf8'), |
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310 data.encode('utf8'), |
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311 self.id.encode('utf8'))) |
107 | 312 |
313 def remove_items(self, item_ids): | |
121
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314 return self._dbpool.runInteraction(self._remove_items, item_ids) |
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315 |
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316 def _remove_items(self, cursor, item_ids): |
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317 self._check_node_exists(cursor) |
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318 |
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319 deleted = [] |
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320 |
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321 for item_id in item_ids: |
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322 cursor.execute("""DELETE FROM items WHERE |
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323 node_id=(SELECT id FROM nodes WHERE node=%s) AND |
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324 item=%s""", |
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325 (self.id.encode('utf-8'), |
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326 item_id.encode('utf-8'))) |
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327 |
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328 if cursor.rowcount: |
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329 deleted.append(item_id) |
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330 |
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331 return deleted |
107 | 332 |
333 def get_items(self, max_items=None): | |
121
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334 return self._dbpool.runInteraction(self._get_items, max_items) |
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335 |
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336 def _get_items(self, cursor, max_items): |
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337 self._check_node_exists(cursor) |
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338 query = """SELECT data FROM nodes JOIN items ON |
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339 (nodes.id=items.node_id) |
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340 WHERE node=%s ORDER BY date DESC""" |
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341 if max_items: |
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342 cursor.execute(query + " LIMIT %s", |
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343 (self.id.encode('utf8'), |
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344 max_items)) |
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345 else: |
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346 cursor.execute(query, (self.id.encode('utf8'))) |
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347 |
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348 result = cursor.fetchall() |
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349 return [r[0] for r in result] |
107 | 350 |
121
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351 def get_items_by_ids(self, item_ids): |
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352 return self._dbpool.runInteraction(self._get_items_by_ids, item_ids) |
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353 |
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354 def _get_items_by_ids(self, cursor, item_ids): |
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355 self._check_node_exists(cursor) |
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356 items = [] |
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357 for item_id in item_ids: |
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358 cursor.execute("""SELECT data FROM nodes JOIN items ON |
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359 (nodes.id=items.node_id) |
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360 WHERE node=%s AND item=%s""", |
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361 (self.id.encode('utf8'), |
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362 item_id.encode('utf8'))) |
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363 result = cursor.fetchone() |
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364 if result: |
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365 items.append(result[0]) |
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366 return items |
107 | 367 |
368 def purge(self): | |
121
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369 return self._dbpool.runInteraction(self._purge) |
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370 |
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371 def _purge_node(self, cursor): |
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372 self._check_node_exists(cursor) |
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373 |
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374 cursor.execute("""DELETE FROM items WHERE |
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375 node_id=(SELECT id FROM nodes WHERE node=%s)""", |
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376 (self.id.encode('utf-8'),)) |
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377 |